Cyclic prefix based enhanced data recovery in OFDM

Tareq Al-Naffouri, Ahmed A. Quadeer

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

In this correspondence, we show how the cyclic prefix (CP) can be used to enhance the performance of an orthogonal-frequency-division multiplexing (OFDM) receiver. Specifically, we show how an OFDM symbol transmitted over a block fading channel can be blindly detected using the output symbol and associated CP. The algorithm boils down to a nonlinear relationship involving the input and output data only that can be used to search for the maximum-likelihood (ML) estimate of the input. This relationship becomes much simpler for constant modulus (CM) data. We also propose iterative methods to reduce the computational complexity involved in the ML search of the input for CM data.

Original languageEnglish (US)
Article number5420047
Pages (from-to)3406-3410
Number of pages5
JournalIEEE Transactions on Signal Processing
Volume58
Issue number6
DOIs
StatePublished - Jun 1 2010

Keywords

  • Blind channel estimation
  • Genetic algorithm
  • Maximum-likelihood detection
  • Newton's method
  • OFDM

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering

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